Lifting jack



w. CONNOR.

LIFTING JACK. APPLICATION FILED NOV.17. 19-20- Patented Apr. 25, 1922.

' INVENTOR UNITED STATES PA'I'ENT OFFICEQ connon, 0F wmpson, ONTARIO,CANADA.

To all whqm it concern:

Be it kncwn that I, WALTER Connon, ef city of lYindsor, in the eonntyofEssex, Province of Ontario, Canada, have invented certain new anduseful Improvements in Lifting Jacks, of which the fellowing isspecification.

This invention relates to lifting jacks of lever yp a d my bje t s t9 Pv de, a simple, strong and reliable jael'c. which will be double actingeither in or lowering.

I attain my object by means of the c onstr ctions hereinafter describedand; illus} trated in the accompanying drawings which; 7 Fig. l is a.side elevetiqn partly in seetien, of my impreved jack; i Y i F g- 2 a rn e evat o he s m F g" 3 a 'e evet bn' 1 Par o he j ck partly inseetieii, illustrating the In'ede of operation in lo we in the sliding,ar;

Fig. 4 e. 'erOss section on the line 0-?) in.

Fig. 2; and

tions 5 adapted te extend into groeves 6 fqrine'd in" the sides of thelifting b zir; By thisarrengement of theme nbers 4, s 1 ffi cient of theliftin bar between the guiding points is exposed: to the operation f thelifting lever.

The lifting the lifting bar as shown, and is provided with trunnions 8,which ztre adapted te enter open bearings 9,..ferrn'ed the ineiiiber 4.The lifting lever is thus readily removable when the liftingber is notin positien.

On the lifting, lever are pivoted the def pending pawls or dogs 10,which-areedapted to engage ratchet teeth 11 formed jon' pp'e site facesof the lifting barf. The raltehet teeth on.v one face of the bar,ereipreferebly arranged in staggered relzitienship to{ the we on the@iit s' fe we Specification, of: Lett rs Batent.

e pawl. he ngth iacee f efo I lever 7 is forked to embrace- LIE-TINGJACK.

Patented Apr. 1922 Ap li i n filedfiqvsnhee 19 ,9 sg gl. 42.54.52 6,.

h PTa i' i Ldj pewlsfit'will be t t ting etl 1 he up t' n e end diewnr'ok i lever. As the pew 1s hating" W? t e] t i ee' f if ne 'i ei plieid' e eeeeflely heret end. t e bth a y in Ope at n and. du' eb To P m tbf the l t-its b 7 b ipg 10w,

y es i h p. m d t!" mm m; ti g 'h-I pr'qvi e he e nisrnl "The's'terri 12is slid'abl V the standerdte nevelengi abe nt th a This ein is normallyn W rdly p a e p'mgm e 14. Meredi h, be. n ag d by." the in. 'e le'e1.5. firmed. one i fqt he. Wh n ei d di," this 'heif 'e pi i i j. ne ind'p i heewhen'the H were ts l mi 9f wnwed l fd eied; we f em t f y fliftg be: o hus. i, en a .mm. the mete o'st lw th l h it "Emm tii" xru nioiiit: oll ws at q he lifii ei' W1 1 be e'f i e 11? tee h; it we 2 fhfhft'?in levef T." e pw rd mevement must, of course, be l Vided r Piis iing ywhen th il 'ek s e bel ise m. i or: this. 'piirpqs'e' l' rev t1 0whichti s integrally refined; cam 17 ts n e 6nd; e evel? handle. 6, 3lie t r ng; if

qf the, mi 1. imited ending up from the upper end of the standard ateach side; a forked lever embracing the sliding bar and journalled insaid members;

depending dogs pivoted on the lever at opposite faces of the bar andadapted to engage the ratchet teeth thereon; a stem slidablelongitudinally of the standard adjacent one of the upwardly extendingmembers; a spring tending to raise the stern; a head on the stemextending into proximity to the pawls; an inclined plane on each pawladapted to engage the head, when the stem is extended and the pawl inits lowermost position, to disengage the pawl from the sliding bar; andmeans for releasably holding the head depressed comprising an integralcam lever formed with a head engaging cam, a journal and a lever handle,the adjacent upwardly extending member having a bearing formedthereinthrough which the lever handle may be passed to position the journal inthe bearing. 7 j

7. In a jack, the combination of a standard having open bearings'formedtherein; a

lifting bar slidable therein and having downwardly facing ratchet teethformed at opposite sides thereof; a forked lever embracing the-slidingbar and provided with 'integral trunnions adapted to be received in sa dopen bearings; and depending dogs at opposite faces of the bar adaptedto engage the ratchet teeth thereon and provided with integral trunnionshaving bearings in the said forked lever.

Signed at Windsor Ontario this fifth day of November 1920. WALTERCONNOR.

Witnesses: Y

D. A. CHATER, YVONNE HAMEL.

